Question

Ques. Define :-
(a) Cellulose
(b) Cud
(c) Saliva


please answer ncert chapter 2
class 7 ​

Answer 1

Explanation:

*cell wall is made up of cellulose in plants.

*Cud means partly digested food in food pipes of some herbivores animals can return to its mouth.

*saliva is a liquid like substances produced by salivary glands,salivary enzymes which plays an important role in digestion of food by mixing with food substance.Mainly it is found at mouth.

Answer 2

Answer:

a. Cellulose is a natural substance that forms the cell walls of all plants and trees and is used in making plastics, paper, etc.

b. Cud - the food that cows and similar animals bring back from the stomach into the mouth to eat again.

c. Saliva - Saliva is a enzyme which contains amylase which is responsible for the breaj down of carbohydrates.